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US5086247A - Armature - Google Patents

Armature Download PDF

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Publication number
US5086247A
US5086247A US07/432,303 US43230389A US5086247A US 5086247 A US5086247 A US 5086247A US 43230389 A US43230389 A US 43230389A US 5086247 A US5086247 A US 5086247A
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US
United States
Prior art keywords
armature
coil
armature coil
steel reinforcing
insulating material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US07/432,303
Inventor
Akira Morishita
Keiichi Konishi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Assigned to MITSUBISHI DENKI KABUSHIKI KAISHA reassignment MITSUBISHI DENKI KABUSHIKI KAISHA ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: KONISHI, KEIICHI, MORISHITA, AKIRA
Application granted granted Critical
Publication of US5086247A publication Critical patent/US5086247A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
    • H02K3/51—Fastening of winding heads, equalising connectors, or connections thereto applicable to rotors only

Definitions

  • the present invention relates to an armature of an electric motor such as an engine starter motor having an armature core and an armature coil wound thereon.
  • FIGS. 2 and 3 An example of a conventional armature of such motor is shown in FIGS. 2 and 3, in which an armature 1 includes an armature core 2 and an armature coil 3 wound thereon and is supported by a motor shaft 4 on which a commutator 5 is provided.
  • a pair of steel rings 6 are fitted on an outer periphery of the armature coil 3, at opposite ends thereof through insulating tape 7.
  • the steel rings 6 function to prevent the armature coil 3 from being radially outwardly scattered by centrifugal force applied thereto when the motor rotates.
  • the insulating tape 7 is disposed therebetween.
  • the insulating tape 7 is wound on the outer periphery of the armature coil 3, which requires a time consuming work, practically.
  • An object of the present invention is to remove such time consuming work to thereby reduce a manufacturing cost of an armature of an electric motor.
  • the above object is achieved according to the present invention by coating a steel ring with an electrically insulative material.
  • FIG. 1 is an enlarged side view of a main portion of an armature coil of an armature according to the present invention
  • FIG. 2 is a partially cross sectioned side view of a conventional armature
  • FIG. 3 is an enlarged side view of a main portion of the conventional armature shown in FIG. 2.
  • FIG. 1 which shows an embodiment of the present invention applied to an armature which is basically the same as the conventional armature shown in FIG. 2, each steel ring 6 fitted on an outer periphery of an armature coil 3 on an armature 1 has a coating 8 of electrically insulative material completely surrounding the ring 6.
  • the electrical insulation of the armature coil 3 from the steel rings 6 is provided by a portion of the insulative coating 8 of the steel rings 6 which is disposed or fitted therebetween.
  • the mechanical strength of the steel ring can be improved. That is, when the coating 8 is of a suitable resin material which is mechanically tough, the mechanical strength of the steel ring is totally improved or the steel ring may be made thinner.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)

Abstract

An armature of an electric motor, having an armature core and an armature coil wound thereon, comprises a steel ring fitted on the armature coil for preventing the armature coil from being scattered by centrifugal force applied thereto during rotation of the motor, the steel ring having a coating of insulating material and adapted to be fitted on the armature coil directly.

Description

This is a continuation of application Ser. No. 07/172,527, filed Mar. 24, 1988.
BACKGROUND OF THE INVENTION
The present invention relates to an armature of an electric motor such as an engine starter motor having an armature core and an armature coil wound thereon.
An example of a conventional armature of such motor is shown in FIGS. 2 and 3, in which an armature 1 includes an armature core 2 and an armature coil 3 wound thereon and is supported by a motor shaft 4 on which a commutator 5 is provided. A pair of steel rings 6 are fitted on an outer periphery of the armature coil 3, at opposite ends thereof through insulating tape 7.
In the conventional armature constructed as above, the steel rings 6 function to prevent the armature coil 3 from being radially outwardly scattered by centrifugal force applied thereto when the motor rotates. In order to electrically insulate the armature coil 3 from each steel ring 6, the insulating tape 7 is disposed therebetween.
The insulating tape 7 is wound on the outer periphery of the armature coil 3, which requires a time consuming work, practically.
SUMMARY OF THE INVENTION
An object of the present invention is to remove such time consuming work to thereby reduce a manufacturing cost of an armature of an electric motor.
The above object is achieved according to the present invention by coating a steel ring with an electrically insulative material.
BRIEF DESCRIPTION OF THE DRAWING
FIG. 1 is an enlarged side view of a main portion of an armature coil of an armature according to the present invention;
FIG. 2 is a partially cross sectioned side view of a conventional armature; and
FIG. 3 is an enlarged side view of a main portion of the conventional armature shown in FIG. 2.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
In FIG. 1 which shows an embodiment of the present invention applied to an armature which is basically the same as the conventional armature shown in FIG. 2, each steel ring 6 fitted on an outer periphery of an armature coil 3 on an armature 1 has a coating 8 of electrically insulative material completely surrounding the ring 6. The electrical insulation of the armature coil 3 from the steel rings 6 is provided by a portion of the insulative coating 8 of the steel rings 6 which is disposed or fitted therebetween.
Therefore, the winding step of the insulating tape with respect to the armature coil is removed and it is enough to merely fit the coated steel rings 6 on the armature coil, resulting in a practically considerable improvement on manufacturing of the armature.
When the insulating material forming the coating 8 is selected suitably, the mechanical strength of the steel ring can be improved. That is, when the coating 8 is of a suitable resin material which is mechanically tough, the mechanical strength of the steel ring is totally improved or the steel ring may be made thinner.

Claims (2)

What is claimed is:
1. An electric motor armature including a core (2) and a coil (3) wound thereon with axially outwardly extending opposite end turns, comprising: a pair of pre-insulated steel reinforcing rings (6) individually fitted around said opposite end turns of the coil for preventing said coil from being radially outwardly scattered by centrifugal force applied thereto during rotation of said armature, said steel reinforcing rings being completely surrounded and enclosed by a coating of insulating material (8) applied thereto before fitting of said rings around said coil such that said fitting is simplified.
2. The armature as claimed in claim 1, wherein said insulating material is a synthetic resin having a mechanical strength large enough to improve mechanical properties of said steel reinforcing rings.
US07/432,303 1987-04-10 1989-11-01 Armature Expired - Lifetime US5086247A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1987054988U JPS63164346U (en) 1987-04-10 1987-04-10
JP62-54988 1987-04-10

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US07172527 Continuation 1988-03-24

Publications (1)

Publication Number Publication Date
US5086247A true US5086247A (en) 1992-02-04

Family

ID=12986029

Family Applications (1)

Application Number Title Priority Date Filing Date
US07/432,303 Expired - Lifetime US5086247A (en) 1987-04-10 1989-11-01 Armature

Country Status (3)

Country Link
US (1) US5086247A (en)
JP (1) JPS63164346U (en)
KR (1) KR910003165Y1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6018209A (en) * 1994-12-14 2000-01-25 Nippondenso Co., Ltd. Rotary electric machine having resilient fixing cap
US6064136A (en) * 1998-01-20 2000-05-16 Mitsubishi Denki Kabushiki Kaisha Armature and method for manufacturing same
US20030107295A1 (en) * 2001-12-07 2003-06-12 Denso Corporation Rotary electric machine having collar for restricting coil end expansion
WO2006030094A1 (en) * 2004-09-09 2006-03-23 Valeo Equipements Electriques Moteur Rotor armature of an electric starter motor with partial impregnation and motor vehicle starter comprising one such armature

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT164722B (en) * 1947-02-10 1949-12-10 Elin Ag Elek Ind Wien Securing the winding heads of rotors in electrical machines
CH438472A (en) * 1966-06-14 1967-06-30 Bbc Brown Boveri & Cie Rotor winding for a commutator machine
US3509621A (en) * 1968-05-29 1970-05-05 Allis Chalmers Mfg Co Method of applying a support for the end turns of a dynamoelectric machine
SU792489A1 (en) * 1978-10-30 1980-12-30 Ташкентский Ордена Трудового Красного Знамени Институт Инженеров Железнодорожного Транспорта Electric machine armature
SU792488A1 (en) * 1978-04-20 1980-12-30 Ташкентский Ордена Трудового Красного Знамени Институт Инженеров Железнодорожного Транспорта Electric machine armature

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT164722B (en) * 1947-02-10 1949-12-10 Elin Ag Elek Ind Wien Securing the winding heads of rotors in electrical machines
CH438472A (en) * 1966-06-14 1967-06-30 Bbc Brown Boveri & Cie Rotor winding for a commutator machine
US3509621A (en) * 1968-05-29 1970-05-05 Allis Chalmers Mfg Co Method of applying a support for the end turns of a dynamoelectric machine
SU792488A1 (en) * 1978-04-20 1980-12-30 Ташкентский Ордена Трудового Красного Знамени Институт Инженеров Железнодорожного Транспорта Electric machine armature
SU792489A1 (en) * 1978-10-30 1980-12-30 Ташкентский Ордена Трудового Красного Знамени Институт Инженеров Железнодорожного Транспорта Electric machine armature

Non-Patent Citations (6)

* Cited by examiner, † Cited by third party
Title
177 USPQ 523 in Re LUCK and GAINER No. 8842; Decision 04/26/73; C.C.P.A. *
215 USPQ 237 in Re Certain Steel Rod Treating Apparatus, 337 TA 97, Decision of 12/10/81; U.S.I.T.C. *
215 USPQ 237 in Re Certain Steel Rod Treating Apparatus, 337-TA-97, Decision of 12/10/81; U.S.I.T.C.
412 Federal Reporter 2d Series, A. L. Garnero Decision of 06/26/69; C.C.P.A. *
496 Federal Reporter, 2d, Series, J. H. Hughes 9137, Decision of 06/06/74; C.C.P.A. *
726 Federal Reporter, 2d. 1565, Fromson Advance Offset Plate, Inc.; Decision of 11/08/83; U.S.C.A.F.C. *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6018209A (en) * 1994-12-14 2000-01-25 Nippondenso Co., Ltd. Rotary electric machine having resilient fixing cap
US6064136A (en) * 1998-01-20 2000-05-16 Mitsubishi Denki Kabushiki Kaisha Armature and method for manufacturing same
US20030107295A1 (en) * 2001-12-07 2003-06-12 Denso Corporation Rotary electric machine having collar for restricting coil end expansion
US6724124B2 (en) * 2001-12-07 2004-04-20 Denso Corporation Rotary electric machine having collar for restricting coil end expansion
WO2006030094A1 (en) * 2004-09-09 2006-03-23 Valeo Equipements Electriques Moteur Rotor armature of an electric starter motor with partial impregnation and motor vehicle starter comprising one such armature
CN101032066B (en) * 2004-09-09 2011-02-23 法雷奥电机设备公司 Partially dipped electric starter motor rotor armatures and motor vehicle starters incorporating such armatures

Also Published As

Publication number Publication date
JPS63164346U (en) 1988-10-26
KR910003165Y1 (en) 1991-05-13
KR880020667U (en) 1988-11-30

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